from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A rocket engine used to retard, arrest, or reverse the motion of a vehicle, such as an aircraft, missile, or spacecraft.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small rocket engine on a larger rocket or spacecraft designed to slow or reverse its motion.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course
Sorry, no etymologies found.
There is no atmosphere where parachutes can be used, so it has to retrorocket all the way down.
"We could very well be seeing rock, or we could be seeing exposed ice in the retrorocket blast zone," said Ray Arvidson of Washington University, St. Louis, Mo., co-investigator for the robotic arm.
Aug. 20, 1960:After a day in orbit Sputnik 5fires its retrorocket, and when it lands safely, two dogs inside, Strelka and Belka, become the first living creatures to return to Earth from space.
Without giving him an explanation, they had instructed Glenn not to jettison his retrorocket pack in hopes its retention would help keep a loose heat shield in place.
Thus . . . the transporter, which eliminated any need for the goofy retrorocket landings, was born.
At that time Claggett would send a radio signal which would activate a small retrorocket in each satellite, causing it to drop dutifully into its assigned position around the Moon.
On re-entry, a glitch involving a retrorocket made the ship rotate swiftly, and the landing capsule was slow to jettison the service module.
The 27-year-old cosmonaut's mission lasted just 108 minutes and was fraught with drama: a break in data transmission, glitches involving antennas, a retrorocket and the separation of modules.
If you take a look at marine turbine's retrorocket, the jet turbine they outfitted in that pickup can do 800 miles to a tank and the engine can be tuned to burn multiple fuels.
He assumed a single stage rocket, limited to 1-G acceleration, providing all the energy for the trip, launched vertically, requiring a retrorocket to slow it down when returning, and assuming a very low exhaust velocity for the propellant.